For lumbar & shoulder pain, you would the vibration & ice directly where it hurts. I recommend the FLEX - the 50" latex-free strap allows wrapping around larger circumferences, and this configuration also offers the choice of heat or cold.
We are developing a device for the low back, which should be market-ready by year's end.
Relief from acute or chronic pain often requires consistent use (2 - 3x/day) for 1 - 2 weeks. Please visit our Resources page for additional pain relief options. Access our most popular download, What Works For Pain.